Table of Contents
Advertisement
Wear Ring Removal
A. If the wear ring requires replacement, it can be removed
by heating it to 350 - 400 degrees F to break the
Loctite™ bond.
Burn hazard. Heated parts can cause
severe burns. Wear heat resistant gloves when handling
heated parts.
B. The ring may also be ground off if heating fails to affect
removal.
NOTICE: Care should be used to avoid damage to the
ring set.
Wear Ring Installation
Because of the required close tolerances, replacement wear
rings should be obtained from Berkeley or their authorized
representative.
NOTICE: To insure proper bonding, thoroughly clean all
mating parts with solvent to remove all grease, oil, dirt, etc.
Apply a bead of Loctite
No. 504 to the fronthead
®
completely around the middle of the wear ring fit, and press
the wear ring into place.
NOTICE: To avoid distortion and ensure proper installation,
be careful to press the wear rings evenly and completely
into place. They should be firmly butted against the
corresponding fronthead shoulder at the bottom of the wear
ring fit.
Adding Wear Rings
It is possible to add either or both impeller or fronthead
wear rings to pumps which were not so originally equipped
from the factory. This work should be done by a qualified
machinist experienced in similar machining work. Contact
the factory for parts, instructions and correct matching
dimensions.
COUPLING REMOVAL AND
INSTALLATION
Refer to the coupling manufacturer's literature supplied with
the pump.
MECHANICAL SEALS
Mechanical seals covered by these instructions, when
properly installed, will give satisfactory performance. To
ensure proper installation, these instructions should be read
carefully.
Double Mechanical Seal
Standard double mechanical seals consist of two stationary
seats with O-ring seals and a single spring rotating
assembly with O-ring sealing and drive, or O-ring sealing
and elastomer drive ring.
Removal
By this time the frame assembly with backhead should have
been removed to a clean work area.
A. Remove the capscrews that secure the backhead (34) to
the frame (90) and carefully slide it off the shaft sleeve.
B. Remove the solid gland bolts and remove the gland (31).
C. Remove the seal rotating element (45).
D. Inspect all components for damage prior to reassembly.
This should include the shaft sleeve. Replace the
damaged part(s) or replace with a complete new seal.
Installation
A. Remove any burrs or nicks on the sleeve (14) and apply
a light coat of liquid soap or liquid detergent.
NOTICE: Seal faces are lapped and polished to a mirror
finish. It is imperative that sealing faces be handled with
care and kept perfectly clean. DO NOT touch the sealing
faces.
B. Slide the solid gland (31) over the shaft sleeve (14) being
careful not to damage the mechanical seal faces.
NOTICE: The gland, stationary seat and rotating element
must be far enough onto the shaft (4) so as not to
interfere with the installation of the backhead (34).
C. Thoroughly clean the sealing box and install the
mechanical seal (45). Use even pressure to install the
seal.
D. Carefully, so as not to damage the seal (45), slide the
backhead (34) over the shaft (4) and shaft sleeve (14)
and secure to the frame (90) with capscrews.
E. Without touching the seal faces and using a slight
twisting action, push the seal and rotating element into
the backhead (34) sealing box.
F. When the seal spring can easily be compressed by
hand into the sealing box, secure the gland (31) with
capscrews to the backhead.
Operation
Special operating techniques are not required when using
pumps equipped with mechanical seals. However, there are
certain precautions that should be taken.
A. Pumps should never be operated, even to test electrical
connections, until the operator knows that there is oil in
the sealing box. In order to check for oil in the sealing
box, loosen the dry run connections at the box. Tighten
the connections only after oil has started flowing.
Running the seal with an air bound sealing box is the
same as running it without fluid.
B. Some seals will leak slightly when first run. This leakage
should cease within a very short period of time.
Routine Maintenance
Required maintenance at a very minimum as follows:
A. Periodically (150 hours of operation) check to see that
the pumped liquid is going through the sealing box out to
the wet well or drain.
B. Check that the gland bolts have not loosened and that
the gland is flush with the sealing box.
16
Advertisement
Table of Contents
